Question

a child drops a ball from a window. The ball strikes the ground in 3.0seconds. What is the velocity if the ball the instant before it hits the ground

Answer 1

Terminal velocity (Maximum velocity) is 9.8 meters a second. m/s.

If you wanted the exact answer, you would need the distance from the window to the ground; and than divide by 3.0. Otherwise, 9.8 meters a second would be your best bet.

Answer 2

Answer:

$v_f = 29.43 m/s$

Explanation:

As we know that the ball is dropped from rest

So here we know acceleration of the object is due to gravity

So we will have

$a = 9.81 m/s^2$

now we have

$v_f = v_i + at$

here we have

$v_i = 0$

$a = 9.81 m/s^2$

$t = 3.0 s$

now from above equation we have

$v_f = 0 + (9.81)(3)$

$v_f = 29.43 m/s$